PURPOSE: To obtain an information storing device which can scan a storing medium at a high speed over a wide extent and has a large total information storing capacity, high volumetric information density, and high information transferring speed, small size, and compact constitution.
CONSTITUTION: A probe 7 which is used for recording and reproducing information is positioned against a rotating storing medium 9 by moving the prove 7 in the radial direction of the medium 9. An actuator 5 composed of a spiral bimorph element, or actuator 5 constituted by combining an expandable piezoelectric element 5c and displacement expanding mechanism 5d, or actuator 5 constituted by joining piezoelectric elements 5e in a turned-up or zigzag state) is used as the moving means of the probe 7.
YANAGISAWA KEIICHI
KANEKO REIZO